The North American Radio Broadcasting Agreement, usually referred to as NARBA, is a treaty made in 1941 between the United States, Canada, Mexico, Cuba, the Dominican Republic and Haiti relating to the allocation of frequencies for AM radio stations in these countries. In accordance with the treaty, clear channel frequencies were set aside across the radio dial, at a rate of about one per 100 kHz. It also officially expanded the upper limit of the AM broadcast spectrum from 1500 kHz to 1600 kHz. It required that most existing AM stations change frequencies, resulting in a massive shuffling of radio station dial positions. The new frequencies took effect at 3:00 a.m. Eastern on March 29, 1941. For the movie, see 1941 (film) 1941 (MCMXLI) was a common year starting on Wednesday (the link is to a full 1941 calendar). ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ... A kilohertz (kHz) is a unit of frequency equal to 1,000 hertz (1,000 cycles per second). ... EST is UTC-5 The North American Eastern Standard Time Zone (abbreviated EST) is a geographic region that keeps time by subtracting five hours from Coordinated Universal Time (UTC) resulting in UTC-5. ... March 29 is the 88th day of the year in the Gregorian Calendar (89th in Leap years). ... For the movie, see 1941 (film) 1941 (MCMXLI) was a common year starting on Wednesday (the link is to a full 1941 calendar). ...

NARBA is no longer in effect. It has been superseded by working agreements made in the early 1980s between the U.S. and Canada and between the U.S. and Mexico, and by an ITU-sponsored agreement covering all of the Western Hemisphere. Monument in Bern, Switzerland. ...

Among the most significant changes were:

CBK is a Canadian radio station, broadcasting the CBC Radio One network at 540 AM in Saskatchewan. ... CFRB, or CFRB 1010 as it is often referred to, is an AM radio station in Toronto, Canada, broadcasting on 1010 kHz, with a shortwave radio simulcast by CFRX on 6070 kHz. ... CFRB, or CFRB 1010 as it is often referred to, is an AM radio station in Toronto, Canada, broadcasting on 1010 kHz, with a shortwave radio simulcast by CFRX on 6070 kHz. ... CFPL, or AM980, is a radio station owned by Corus Entertainment and based in London, Ontario, Canada that transmits at 380,000 watts at 980 kHz on the AM dial. ... CFPL, or AM980, is a radio station owned by Corus Entertainment and based in London, Ontario, Canada that transmits at 380,000 watts at 980 kHz on the AM dial. ... CBLA is a Canadian radio station. ... CKLW is a 50,000 watt AM radio station broadcasting at 800 kHz located in Windsor, Ontario. ... CBL is a TLA that could mean: Computer Based Learning Calculator-Based Laboratory Câmara Brasileira do Livro [1] Cambuslang station – see UK railway stations - C Basketball: Canadian Baseball League (defunct) Chinese Basketball League China Baseball League Cannabicyclol Centraal Bureau Levensmiddelenhandel [2] Chesapeake Biological Laboratory [3] Chester Beatty Library [4] Composite... CFRB, or CFRB 1010 as it is often referred to, is an AM radio station in Toronto, Canada, broadcasting on 1010 kHz, with a shortwave radio simulcast by CFRX on 6070 kHz. ... CHML is a Canadian radio station, broadcasting at 900 AM in Hamilton, Ontario. ... CBVT is the Societé Radio-Canada station in Quebec City, Quebec. ... KDKA AM is a U.S. class A clear channel AM radio station located in Pittsburgh, Pennsylvania that operates on 1020 kHz. ... WBZ (AM) is the callsign for an AM radio station in Boston, Massachusetts, owned by Viacom. ... WHO is a clear channel radio station broadcasting 50,000 watts on 1040 AM with a news/talk format. ... KCBS is an AM radio station in San Francisco, California that is a key West Coast radio station of the CBS Radio Network and Westwood One, broadcasting at 740 kHz. ... KCBS is an AM radio station in San Francisco, California that is a key West Coast radio station of the CBS Radio Network and Westwood One, broadcasting at 740 kHz. ... 1947 (MCMXLVII) was a common year starting on Wednesday (the link is to a full 1947 calendar). ... KYW is a class A AM radio station on 1060 kHz licensed to Philadelphia, Pennsylvania. ... ... ... CKLW is a 50,000 watt AM radio station broadcasting at 800 kHz located in Windsor, Ontario. ... WTIC is the callsign for three broadcast stations in Hartford, Connecticut: WTIC AM, 1080 kHz WTIC-FM, 96. ... KRLD NewsRadio 1080 is a dual format news and talk radio station owned by Infinity Broadcasting Corporation and located in Dallas, Texas. ... WBAL is the callsign of several broadcast stations in Baltimore, Maryland WBAL (AM) 1090 AM WBAL-TV channel 11 WBAL-FM is now WIYY-FM 97. ... KFAB 1110 AM of Omaha Nebraska is a talk radio station that plays such national shows as Michael Savage and Glenn Beck and Matt Drudge and Rush Limbaugh and local radio show hosts Gary Sadlemyer andTom Becka and a local weekly christian show by Dr. Bill Bowers who is pastor... Located in Fort Wayne, Indiana, WOWO is an independent news/talk radio station transmitting on 1190 kHz at 50,000 watts during the daylight hours and 9,800 watts during the nighttime hours. ... WWVA is a radio station with studios in Wheeling, West Virginia, USA. WWVA began broadcasting in 1926. ... WPHT AM is a clear channel radio station located in Philadelphia, Pennsylvania broadcasting on 1210 kHz. ... WPHT AM is a clear channel radio station located in Philadelphia, Pennsylvania broadcasting on 1210 kHz. ... NewsRadio 1190 KEX is a clear channel AM radio station broadcasting on 1190 kHz from Portland, Oregon. ... KKOB-AM Logo KKOB-AM is an AM radio station operating out of Albuquerque, New Mexico, the oldest in the state. ... KKOB-AM Logo KKOB-AM is an AM radio station operating out of Albuquerque, New Mexico, the oldest in the state. ... Sportsradio 66 WFAN AM 660 kHz, often referred to as The FAN, is a radio station in New York City. ... KFAN (1130 AM) is a sports talk radio station in the Minneapolis-St. ... WINS (AM), known on-air as 1010 WINS, is an all-news radio station in New York City at 1010 kHz, owned by CBS Radio (formerly Infinity Broadcasting). ... WOAI-TV is the San Antonio, Texas local NBC television station affiliate. ... WSAZ-TV is a television station in Huntington, West Virginia. ... KSTP is the call sign used for a set of television and radio stations with studios in Saint Paul, Minnesota. ... WTOP is the only all-news radio station in Washington, DC. WTOP is a class-A station operating on 820 kHz in Frederick, Maryland, WTOP-FM. As of January 4, 2006, WTOP also broadcasts on 103. ... WTOP is the only all-news radio station in Washington, DC. WTOP is a class-A station operating on 820 kHz in Frederick, Maryland, WTOP-FM. As of January 4, 2006, WTOP also broadcasts on 103. ... KGA, also known as 1510 KGA The Big Talker, is a all-talk station station based in Spokane, Washington. ... WLAC is a clear channel radio station based in Nashville, Tennessee, operating at 1510 kHz on the AM dial, took to the air on November 24, 1926. ... WWZN is a sports radio station licensed to serve the Boston market. ... WWZN is a sports radio station licensed to serve the Boston market. ... WWKB (formerly WKBW) is a radio station in Buffalo, New York that operates on an AM frequency of 1520. ... WWKB (formerly WKBW) is a radio station in Buffalo, New York that operates on an AM frequency of 1520. ... KFBK AM (NewsTalk 1530) is a clear channel AM radio station in Sacramento, California broadcasting on a frequency of 1530 kHz. ... WQEW 1560 AM is a Radio Disney affiliate. ... WQEW 1560 AM is a Radio Disney affiliate. ... CFPL, or AM980, is a radio station owned by Corus Entertainment and based in London, Ontario, Canada that transmits at 380,000 watts at 980 kHz on the AM dial. ...

See also

• Canadian allocations changes under NARBA

More on clear, regional and local AM Channels in Canada Mexico and USA The North American Radio Broadcasting Agreement took effect on March 29, 1941, requiring nearly all radio stations in North America to change frequency. ...